The National Aeronautics and Space Administration (NASA) aims to launch the upcoming US-European ocean-surveillance satellite – Sentinel-6 (Sentinel-6) on November 21, 2020. The satellite will be launched with a Falcon 9 rocket from Vandenberg Air Force Base, California. This information was shared through a series of tweets by Kathy Lieders, head of NASA’s manned spacecraft program. Lyders said that, after SpaceX testing and hardware inspection, it will replace a total of two engines in the first stage of the rocket. He further stated that, this work is now proceeding to complete the engine change work and all engine hardware replacements